Abstract

The rotational Doppler effect has attracted extensive attention, caused by the angular momentum and energy exchange between rotating objects and waves. However, most previous works used a simple rotation frame, which made use of only a single-round angular momentum and energy exchange. We propose and demonstrate a frame containing a spiral phase plate cascaded with rotating targets to make an amplification of the traditional Doppler shift, and reduce the diffusion of orbital angular momentum modes by half, which means the distance of practical application is doubled theoretically. To this end, an experiment is carried out to verify the frame. It shows a more practical, convenient, and non-destructive method to measure the rotational speed of a remote target.

© 2021 Optical Society of America

Influence of lateral misalignment on the optical rotational Doppler effect

Song Qiu, Tong Liu, Zhimeng Li, Chen Wang, Yuan Ren, Qiongling Shao, and Chaoyang Xing
Appl. Opt. 58(10) 2650-2655 (2019)

Direction-sensitive rotational speed measurement based on the rotational Doppler effect of cylindrical vector beams

Rusheng Sun, Song Qiu, Fang Han, Zhengliang Liu, Wei Cai, Tong Liu, and Yuan Ren
Appl. Opt. 61(27) 7917-7924 (2022)

Fragmental optical vortex for the detection of rotating object based on the rotational Doppler effect

Song Qiu, You Ding, Tong Liu, Zhengliang Liu, Hao Wu, and Yuan Ren
Opt. Express 30(26) 47350-47360 (2022)

Analysis of misaligned optical rotational Doppler effect by modal decomposition

You Ding, Yuan Ren, Tong Liu, Song Qiu, Chen Wang, Zhimeng Li, and Zhengliang Liu
Opt. Express 29(10) 15288-15299 (2021)

Rotational object detection at noncoaxial light incidence based on the rotational Doppler effect

Song Qiu, You Ding, Tong Liu, Zhengliang Liu, and Yuan Ren
Opt. Express 30(12) 20441-20450 (2022)